Drilling Cycle Programming Question

[Latheboy]

Hello all,

Is there a way to set the plunge feed rate from the Clearance Height to the Retract Height faster then the faster than the Model/Stock Top to Bottom of the cycle plunge?  I have a bunch of tall clamps holding a plate, and to avoid a crash the Retract is up high.  With multiple countersinks at a very slow Z feed, the air portion is taking too long.  I am using the drill function with rapid out.  Thanks.. 

[a.laasW8M6T]

Hi 

Even if you make the retract height higher its should still rapid down to the Feed height and then start drilling

Some of how this is handled is in the post processor though, I know with our old Heidenhain it will feed from the retract height slowly like you describe, to get around this I just commented out the drilling cycle in the post and force it to use Expanded cycles, which just post the drilling out as G1/G0, rather than a canned cycle.

Can you share what post processor you are using and a file that shows the drilling problems you are having?

[Latheboy]

Attached is the same programming which I used to test the file on a scrap of the same material.  I have also attached the PP.  Maybe a bad habit or ignorance on my part as a less than seasoned machinist with CNC, but I learned to set everything at Stock Top or Model Top.  Bad plan?  Thanks..

[a.laasW8M6T · Accepted solution]

The Fusion defaults for Heights are generally a very good safe way of programming, setting everything to stock top is ok but I wouldn't recommend, It works in this case because the stock top, model top and hole top are the same but there are many situations where they aren't and you can get issues.

see video for more info

[Latheboy]

Thank you for the video and details.  I need to review again and study.   😁